WO2021167306A1

WO2021167306A1 - Heat exchanger

Info

Publication number: WO2021167306A1
Application number: PCT/KR2021/001915
Authority: WO
Inventors: 신성홍
Original assignee: 한온시스템 주식회사
Priority date: 2020-02-19
Filing date: 2021-02-15
Publication date: 2021-08-26
Also published as: KR20210105510A

Abstract

The present invention relates to a heat exchanger and, particularly, to a heat exchanger wherein: multiple refrigerant tubes are connected to both ends of each of a pair of header tanks, the refrigerant tubes forming flow channels through which a heat exchange medium flows; a fin is interposed between the refrigerant tubes so as to be coupled to same; and both ends of a dummy tube are coupled to the header tank, the dummy tube having the same shape as the refrigerant tube and not allowing refrigerant to flow therethrough. Accordingly, the dummy tube replaces an existing support configured to improve the structural hardness of a heat exchanger, and thus functions as a support, thereby reducing the number of components constituting a heat exchanger, simplifying the structure of components, and enabling easy assembly and manufacture.

Description

heat exchanger

The present invention relates to a heat exchanger, and relates to a heat exchanger capable of improving structural rigidity of a core formed by stacking a plurality of refrigerant tubes and fins among components constituting the heat exchanger.

In general, a heat exchanger is a device that absorbs heat from one side and radiates heat to the other side between two environments with a temperature difference. When released, it acts as a heating system.

In addition, the vehicle is provided with an air conditioning device for cooling or heating the vehicle interior and a cooling device for cooling the engine. This method is usually used a lot.

In this heat exchanger, as shown in FIG. 1 , a pair of header tanks 10 are spaced apart and formed in parallel, both ends are connected to the header tanks 10, and a plurality of refrigerant tubes ( 20), a fin 30 interposed between the refrigerant tubes 20 and coupled to the tube, and the refrigerant tubes 20 and the fins arranged in a stacked arrangement and disposed at the outermost portion of the fins so that both ends are coupled to the header tank 10 It is configured to include a support (40). Here, the support 40 is a structure that improves the overall rigidity of the heat exchanger, protects the core portion formed by stacking tubes and fins, and allows the size of the core portion to be accurately formed.

Here, the support of the conventional heat exchanger is formed in a shape different from that of the refrigerant tube, and a separate coupling structure is formed so that it can be accurately assembled and coupled with the header tank while reinforcing the rigidity of the core part, and a separate coupling structure is also provided in the header tank. is formed.

However, the structure of such a support is complicated in shape and the coupling structure with the header tank is complicated, so it is difficult to manufacture the support and it is also difficult to assemble and combine the support and the header tank.

[Prior art literature]

[Patent Literature]

KR 10-2017-0104248 A (2017.09.15)

The present invention has been devised to solve the above problems, and an object of the present invention is to reinforce structural rigidity by using a dummy tube of the same shape as a refrigerant tube through which a heat exchange medium flows among components constituting a heat exchanger. To provide a heat exchanger that allows

The heat exchanger of the present invention for achieving the above object, a pair of header tanks having a flow space in which a heat exchange medium is stored and flowed therein is formed and arranged to be spaced apart from each other; a plurality of refrigerant tubes having both ends connected to the flow space of the pair of header tanks and having flow paths through which a heat exchange medium flows therein; a fin interposed between the refrigerant tubes and coupled to the tube; and a dummy tube having both ends coupled to the outside of the flow space of the pair of header tanks. A dummy tube insertion hole is formed through the pair of header tanks on opposite sides, respectively, and a stopper protruding inward is formed in each of the pair of header tanks, so that an end of the dummy tube is formed. It may be inserted into the dummy tube insertion hole, and an end of the dummy tube may be supported by contacting the stopper.

The header tank may include: a header having refrigerant tube insertion holes into which the refrigerant tubes are inserted and a dummy tube insertion hole into which the dummy tube is inserted; and a tank coupled to the header to form the flow space therein, the stopper protruding inwardly at a position corresponding to the dummy tube insertion hole of the header; may be included.

The header tank may further include a baffle coupled to the header and the tank and disposed between the refrigerant tube insertion hole and the dummy tube insertion hole of the header to partition the flow space.

In addition, the tank is formed in a "C" or "C" shape in cross section, a slit-shaped notch is formed in the width direction sidewall of the tank, and a portion of the width direction sidewall of the tank adjacent to the notch is bent inward. to be formed as the stopper.

In addition, the stoppers may be formed as a pair, and a distance spaced apart from each other in the width direction of the pair of stoppers may be narrower than the width of the dummy tube.

In addition, the stopper may be formed at the end of the header tank in the height direction, and one notch may be formed in the height direction adjacent to the stopper.

In addition, the dummy tube may be disposed on one or both sides of the outermost side in which a plurality of refrigerant tubes and fins are stacked.

In addition, the stopper may be formed between both ends of the header tank in the height direction, and a pair of notches may be formed adjacent to the stopper in the height direction.

In addition, the dummy tube may be disposed between a plurality of refrigerant tubes and fins are stacked.

In addition, the dummy tube may be formed in the same shape and size as the refrigerant tubes.

In addition, the dummy tube may be formed with a plurality of ribs partitioning an inner space.

Also, the heat exchange medium may not flow inside the dummy tube.

In addition, the pair of header tanks, the plurality of refrigerant tubes, the fins, and the dummy tube may be integrally joined by brazing.

The heat exchanger of the present invention does not use a separate support and a dummy tube of the same shape as the refrigerant tube can replace the function of the support, so the number of components can be reduced and the structure of the components is simple, making it easier to manufacture the heat exchanger It has the advantage of being easy.

1 is an assembled perspective view showing a conventional heat exchanger.

2 is an assembled perspective view showing a heat exchanger according to an embodiment of the present invention.

3 to 5 are a partial perspective view, an upper plan view, and a right side view illustrating an assembly structure of a header tank and a dummy tube in a heat exchanger according to an embodiment of the present invention.

6 is an assembled perspective view showing a heat exchanger according to another embodiment of the present invention.

7 is a partial perspective view showing the assembly structure of the header tank and the dummy tube in the central portion of the header tank in the height direction of the heat exchanger according to another embodiment of the present invention.

Hereinafter, the heat exchanger of the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings.

2 is an assembled perspective view showing a heat exchanger according to an embodiment of the present invention, and FIGS. 3 to 5 are a partial perspective view showing an assembly structure of a header tank and a dummy tube in the heat exchanger according to an embodiment of the present invention, an upper plan view and a right side view.

As shown, the heat exchanger according to an embodiment of the present invention may be largely configured to include a pair of header tanks 100 , a plurality of refrigerant tubes 200 , a plurality of fins 300 , and a dummy tube 400 . can

The header tank 100 has a space in which a heat exchange medium is stored and flows therein, and a pair may be disposed to be spaced apart from each other by a predetermined distance in the longitudinal direction. In addition, an inlet pipe 140 through which the heat exchange medium is introduced and an outlet pipe 150 through which the heat exchange medium is discharged may be formed in the header tank 100 , and the inlet pipe 140 and the outlet pipe 150 are a pair of headers. It may be formed in various positions and numbers in any one or more of the tanks 100 .

In addition, the header tank 100 may be configured to include, for example, the header 110 and the tank 120 , and may further include a baffle 130 . The header 110 may be formed in an approximately "C" shape in cross section cut along a plane formed in the width direction and the length direction, and sidewalls 110b in the longitudinal direction at both ends of the base portion 110a formed in a curved shape in the width direction. ) may be formed in an extended form, and a stepped step 110c may be formed inside the sidewalls 110b facing each other. In addition, the header 110 has refrigerant tube insertion holes 111 through which the refrigerant tubes 200 are inserted into the base portion 110a, and a dummy tube insertion hole 112 through which the dummy tube 400 is inserted is formed. can be Here, the refrigerant tube insertion holes 111 are spaced apart from each other by a predetermined distance in the height direction and may be formed through both sides of the base portion 110a in parallel, and the dummy tube insertion holes 112 are the refrigerant tube insertion holes 111 . It may be spaced apart from each other in the height direction and formed side by side. In addition, the dummy tube insertion hole 112 is formed outside the refrigerant tube insertion hole 111 in the height direction, and is formed between the uppermost dummy tube insertion hole 112 and the lowermost dummy tube insertion hole 112 . Tube insertion holes 111 may be located. In addition, the dummy tube insertion hole 112 may be formed in the same size and shape as the refrigerant tube insertion hole 111 . The tank 120 may be formed in an approximately "C" shape or a "C" shape in cross section cut along a plane formed in the width direction and the length direction, and a length at both ends of the body 120a formed in a curved shape in the width direction. The sidewalls 120b may be formed to extend in the direction. Thus, the header 110 and the tank 120 are coupled in such a way that the sidewalls 120b of the tank 120 are inserted inside the sidewalls 110b of the header 110 in the longitudinal direction with the concave portions facing each other. Also, the sidewalls 120b of the tank 120 may be coupled to each other by being supported on the stepped 110c formed to be stepped on the sidewall 110b of the header 110 to limit the insertion depth. In addition, the baffle 130 is a flat plate ( 131), the baffle 130 has protruding tabs 132 extending outward in the longitudinal direction from the plate 131, and protruding tabs ( 132) may be inserted and combined. Thus, both sides of the inner flow space formed by the combination of the header 110 and the tank 120 in the height direction may be blocked by the baffles 130 . Also, the baffle 130 may be disposed between the dummy tube insertion hole 112 of the header 110 and the adjacent refrigerant tube insertion hole 111 in the height direction.

Here, at both ends of the tank 120 in the height direction, stoppers 121 protruding inward in the width direction than the sidewalls 120b of the tank 120 and protruding into the flow space inside the header tank 100 may be formed. . At this time, a notch 122 in which a part of the sidewall 120b and the body 120a of the tank 120 is cut in the form of a slit is formed, and a part of the sidewall 120b and the body 120a adjacent to the notch 122 is inside. A portion bent to the inner side of the sidewalls 120b of the tank 122 may be formed as the stopper 121 . And the free end, which is the longitudinal end of the stopper 121 , may be formed to be longitudinally spaced apart from the inner surface of the base portion 110a of the header 110 , and the stopper 121 has a dummy tube insertion hole 112 in the height direction. ) may be formed at a position corresponding to the

Both ends of the refrigerant tube 200 are connected to a flow space through which the heat exchange medium of the pair of header tanks 100 flows, and a flow path through which the heat exchange medium flows may be formed in the refrigerant tube 200 . In addition, the refrigerant tube 200 may be configured in plurality, spaced apart from each other by a predetermined distance in the height direction, and arranged side by side. In addition, the refrigerant tube 200 has a longitudinal end inserted into the refrigerant tube insertion hole 111 formed in the header 110 of the header tank 100 and coupled, and the longitudinal end of the refrigerant tube 200 is inserted into the refrigerant tube. It may pass through the ball 111 and be coupled in a partially protruding form into the flow space that is the inside of the header tank 100 .

The fin 300 is interposed between the refrigerant tubes 200 and may be coupled to the refrigerant tubes 200 , and also between the refrigerant tubes 200 and the dummy tube 400 disposed on the outermost side in the height direction. The fin 300 may be disposed to be coupled to the refrigerant tube 200 and the dummy tube 400 . In addition, the fin 300 may serve to receive heat from the heat exchange medium flowing along the inside of the refrigerant tubes 200 and discharge it to the outside. At this time, the fin 300 may be formed in various ways, such as a corrugated shape or a zigzag shape, to improve heat exchange efficiency.

Both ends of the dummy tube 400 in the longitudinal direction may be coupled to a pair of header tanks 100 . And the dummy tube 400 has a longitudinal end inserted into and coupled to the dummy tube insertion hole 112 formed in the header 110 of the header tank 100, and the longitudinal end of the dummy tube 400 is inserted into the dummy tube insertion hole. It may be coupled to the outside of the flow space through which the heat exchange medium of the header tank 100 flows through the 112 . That is, the dummy tube 400 does not communicate with the internal heat exchange medium flow space formed by the header 110 , the tank 120 , and the baffle 130 , but only the dummy tube insertion hole 112 formed in the header 110 . ), the refrigerant passage formed in the dummy tube 400 may be exposed to the outside of the header tank 100 . Here, the dummy tube 400 may be formed in the same shape and size as the refrigerant tube 200 . That is, the dummy tube 400 may be a tube having the same shape as the refrigerant tube 200 . Thus, the refrigerant tube 200 may be configured such that the heat exchange medium flows along the internal flow path, and the heat exchange medium does not flow through the internal flow path of the dummy tube 400 . In addition, the longitudinal end of the dummy tube 400 passes through the dummy tube insertion hole 112 formed in the header 110 and is coupled to the inside of the header 110 in a partially protruding form. The longitudinal end is supported in contact with the free end of the stopper 121 formed in the tank 120 , so that the dummy tube 400 is inserted into the inside of the header tank 100 and may be coupled with a limited depth. In addition, the dummy tube 400 may be disposed on one or both sides of the outermost side in which the plurality of refrigerant tubes 200 and the fins 300 are stacked in the height direction. ) was placed.

Thus, in the heat exchanger of the present invention, the dummy tube of the same shape as the refrigerant tube serves as a support for reinforcing the structural rigidity of the heat exchanger. Since the dummy tube of the same type can replace the function of the support, the number of parts constituting the heat exchanger can be reduced. have.

In addition, the stoppers 121 may be formed as a pair spaced apart in the width direction, and the pair of stoppers 121 may be configured to support and support both sides of the dummy tube 400 in the width direction. And the distance between the pair of stoppers 121 in the width direction is narrower than the width of the dummy tube 400, so that the surface of the longitudinal end of the dummy tube 400 can be stably supported by the stopper 121. have.

In addition, the stopper 121 may be formed at the end of the header tank 100 in the height direction. At this time, one notch 122 may be formed in a position in which a portion of the side wall 120b and the body 120a are cut off at a position spaced downward from the upper end of the tank 120 , and the upper portion of the notch 122 . The tank 120 may be formed as a stopper 121 bent inwardly. That is, after forming the approximate shape of the tank 120 in a "C" shape using extrusion or pressing, a part is cut or cut to form a notch, and then the sidewall and base part of the part adjacent to the notch are applied. The stopper 121 can be formed by bending the portion to the inside of the tank 120 to protrude. At this time, the stopper 121 can be easily formed by bending due to the cut-out notch 122 . In addition, by using a single flat plate or a member formed in a "C" shape, it is possible to form a stopper-integrated tank with a single member without a seam.

In addition, the dummy tube 400 may be formed with a plurality of ribs 410 partitioning an inner space. For example, the rib 410 may be formed in such a way that the upper side is coupled to the upper wall in the thickness direction of the dummy tube 400 and the lower side is coupled to the lower wall in the thickness direction of the dummy tube 400 by extrusion molding. A dummy tube 400 integral with the ribs 410 may be formed. In addition, ribs 410 may be formed in various shapes for improving rigidity of the dummy tube 400 . In addition, the outer shape and size of the dummy tube 400 are the same as those of the refrigerant tube 200 , but the material of the dummy tube 400 may be formed of a material having greater strength than that of the refrigerant tube 200 .

Then, the header 110, the tank 120, and the baffle 130 are assembled to form the header tank 100, and the fin 300 is interposed between the refrigerant tubes 200 and the dummy tube 400 to be stacked. After assembling by inserting both ends in the longitudinal direction of the refrigerant tubes 200 and the dummy tubes 400 into the pair of header tanks 100 after adhering them in the same direction, the assembled heat exchanger assembly is brazed to be integrally joined A heat exchanger may be formed.

In addition, the heat exchanger may be configured to further include a gas-liquid separator 500 connected to and coupled to the header tank 100 , and may be formed as a condenser including the gas-liquid separator 500 .

6 is an assembled perspective view showing a heat exchanger according to another embodiment of the present invention, and FIG. 7 is an assembly structure of a header tank and a dummy tube in the central portion of the header tank in the height direction of the heat exchanger according to another embodiment of the present invention. A partial perspective view is shown.

As shown, in the heat exchanger according to another embodiment of the present invention, the dummy tube 400 may be disposed between the plurality of refrigerant tubes 200 and the fins 300 are stacked in the height direction. In addition, the stopper 121 is also disposed between both ends of the header tank 100 in the height direction, and the stopper 121 may be formed at a height corresponding to the height at which the dummy tube 400 is disposed. In addition, the dummy tube 400 may be disposed at the upper end and the lower end in the height direction, and the stopper 121 may be formed in the header tank 100 at a height corresponding thereto.

That is, when the number of refrigerant tubes 200 stacked and arranged in the height direction is relatively large, the dummy tube 400 may be disposed to reinforce structural rigidity even between the refrigerant tubes 200 in the height direction. Alternatively, as shown in the figure, the dummy tubes 400 are arranged in the middle part in the height direction, and the baffle 130 is coupled to the header tank 100 to the outside where the dummy tubes 400 face each other. It may be configured to form a flow path. Thus, the upper and lower heat exchange medium flow paths are divided based on the middle part in the height direction, and a combo cooler having different types of heat exchange medium flowing from the upper side and lower side may be formed as a heat exchanger in which two heat exchangers are combined.

Here, when the dummy tube 400 is disposed in the middle part in the height direction, the stopper 121 should also be formed in the middle part, which is a position between both ends of the header tank 100 in the height direction, so the side wall of the tank 120 . When forming the notch 122 by cutting a part of the

body

120a and 120b, the stopper 121 is easily bent by forming the notches 122 on both sides in the height direction of the portion that becomes the stopper 121. can be formed Also, as shown, a plurality of dummy tubes 400 may be supported on one stopper 121 .

The present invention is not limited to the above-described embodiments, and the scope of application is varied, and anyone with ordinary knowledge in the field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims It goes without saying that various modifications are possible.

[Explanation of code]

100: header tank

110 : header

110a: base part

110b: side wall

110c: step

111: refrigerant tube insertion hole

112: dummy tube insertion hole

120: tank

120a: body

120b: side wall

121: stopper

122: notch

130: baffle

131: plate

132: protrusion tab

140: inlet pipe

150: outlet pipe

200: refrigerant tube

300: pin

400: dummy tube

410: rib

500: gas-liquid separator

Claims

a pair of header tanks having a flow space in which a heat exchange medium is stored and flowed therein, and spaced apart from each other;

a plurality of refrigerant tubes having both ends connected to the flow space of the pair of header tanks and having flow paths through which a heat exchange medium flows therein;

a fin interposed between the refrigerant tubes and coupled to the tube; and

a dummy tube having both ends coupled to the outside of the flow space of the pair of header tanks;

is made, including

A dummy tube insertion hole is formed through the pair of header tanks on opposite sides, respectively, and a stopper protruding inward is formed in each of the pair of header tanks, so that an end of the dummy tube is inserted into the dummy tube insertion hole. The heat exchanger, characterized in that inserted and supported by the end of the dummy tube in contact with the stopper.
According to claim 1,

The header tank is

a header having refrigerant tube insertion holes into which the refrigerant tubes are inserted and a dummy tube insertion hole into which the dummy tube is inserted; and

a tank coupled to the header to form the flow space therein, the stopper protruding inwardly at a position corresponding to the dummy tube insertion hole of the header;

A heat exchanger comprising a.
3. The method of claim 2,

The header tank is

and a baffle coupled to the header and the tank and disposed between the refrigerant tube insertion hole and the dummy tube insertion hole of the header to partition the flow space.
3. The method of claim 2,

The tank is formed in a "C" or "C" shape in cross section, a slit-shaped notch is formed in the width direction sidewall of the tank, and a part of the width direction sidewall of the tank adjacent to the notch is bent inward, so that the Heat exchanger, characterized in that formed with a stopper.
5. The method of claim 4,

The stoppers are formed as a pair, and the distance between the pair of stoppers in the width direction is narrower than the width of the dummy tube.
5. The method of claim 4,

The stopper is formed at the end of the header tank in the height direction,

A heat exchanger, characterized in that one notch is formed in the height direction adjacent to the stopper.
According to claim 1,

The dummy tube is a heat exchanger, characterized in that the plurality of refrigerant tubes and fins are disposed on one or both sides of the outermost stacked.
5. The method of claim 4,

The stopper is formed between both ends of the header tank in the height direction,

A heat exchanger, characterized in that adjacent to the stopper, a pair of notches are formed in the height direction.
According to claim 1,

The dummy tube is a heat exchanger, characterized in that disposed between the plurality of refrigerant tubes and the fins are stacked.
According to claim 1,

The dummy tube is a heat exchanger, characterized in that formed in the same shape and size as the refrigerant tubes.
According to claim 1,

The dummy tube is a heat exchanger, characterized in that the plurality of ribs for partitioning the inner space is formed.
According to claim 1,

The heat exchanger, characterized in that the heat exchange medium does not flow inside the dummy tube.
According to claim 1,

The pair of header tanks, the plurality of refrigerant tubes, the fins, and the dummy tube are integrally joined by brazing.